Spyc

spyc

The file commander built for collaborating with your coding agents.

Keyboard-driven · MCP-native · Rust · macOS and Linux

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Why spyc?

Put an AI coding agent in your terminal and you usually get a chat window. You still describe your working tree to it, paste paths back and forth, and lose track of what it's looking at. spyc runs the agent in a pane beside a keyboard-driven file commander, on macOS and Linux, and gives it live, structured access to exactly what you're looking at via a local MCP socket.

The agent can ask spyc what is the cursor on, what is staged, what is pinned, what is in this directory — no copy-paste, no path description. Pick three files and ask a question; the agent sees your selection. When it mentions a path in its response, press gf to jump straight there.

The file manager is the shared workspace where you and your agents actually work — not a file list bolted onto a chat window.

What it is

A two-pane terminal program:

• The top pane is a keyboard-driven, vim-flavoured file commander with

git-aware listings.

• The bottom pane is a child process — Claude Code by default (Codex,

Gemini, Antigravity, and zot are first-class too), but in practice any program.

The panes share focus through a screen-style ^a chord prefix, and the commander exposes a local MCP socket the agent connects to. Everything else (vi motions, marks, picks, inventory, pager, shell integration) is what you'd expect from a keyboard-driven file manager — the MCP bridge is what sets spyc apart from Yazi, Broot, or Ranger.

The name. Say it "spy-see" — near enough to spicy, which is where the chili comes from. It carries a lineage too: spy and the keyboard-driven file commanders that came before it, rebuilt from scratch in Rust for the age of coding agents.

spyc is an independent project, not affiliated with or endorsed by Side Effects Software Inc. or Anthropic.

Quick start

Prerequisites

• A coding agent — Claude Code is the default

(npm install -g @anthropic-ai/claude-code); Codex, Gemini, and Antigravity also work. spyc runs as a plain file manager without one, but the agent bridge is the whole point.

• Nerd Font (recommended) for the powerline status bar; press C inside

spyc for a mono fallback. Install: brew install --cask font-meslo-lg-nerd-font

• Linux clipboard helper — yank needs wl-copy (Wayland) or xclip /

xsel (X11); macOS uses the built-in pbcopy. See [INSTALL.md](INSTALL.md#clipboard-helper-linux-only).

• Rust 1.88+ — only if you build from source (see [BUILD.md](BUILD.md)).

Install

Pre-built, signed binaries — no Rust toolchain needed:

# macOS & Linux — Homebrew
brew install Tripstack-Corp/tap/spyc

# Debian / Ubuntu — apt (signed repo)
sudo install -d -m 0755 /etc/apt/keyrings
curl -fsSL https://tripstack-corp.github.io/spyc/KEY.gpg | sudo tee /etc/apt/keyrings/spyc.asc >/dev/null
echo "deb [signed-by=/etc/apt/keyrings/spyc.asc] https://tripstack-corp.github.io/spyc ./" | sudo tee /etc/apt/sources.list.d/spyc.list >/dev/null
sudo apt update && sudo apt install spyc

Or grab a tarball from Releases. To build from source instead, see [BUILD.md](BUILD.md). Full setup — terminal, font, clipboard, MCP, and verification — is in [INSTALL.md](INSTALL.md).

Launch

spyc            # opens in the current directory
spyc -r         # resume a previous session (tabs + each agent's conversation)

Move with hjkl, Enter to open a file/dir, e for $EDITOR, ? for the full help overlay.

Your first 5 minutes

The whole point is the agent in the side pane seeing exactly what you see. Try it in a git repo:

1. Run spyc.
2. Press t on two or three files to pick them.
3. Press ^\ (Ctrl+Backslash) to open the agent pane — it launches claude

by default (install it first; see Prerequisites).

1. Ask: "How do these files interact?" The agent reads your picks over

MCP — no pasting paths.

1. When it names a file in its answer, press gf to jump straight to it.

^a j / ^a k switch focus between the list and the pane.

The MCP bridge

This is what sets spyc apart. On startup it runs a local MCP server and writes the agent's config automatically — no flags, no setup. The agent can then ask spyc, at any point:

• What you're looking at — get_spyc_context: cwd, cursor file, picks,

inventory, active filter, git branch.

• Where things are — search_paths / search_content (gitignore-aware),

plus search_picks and search_inventory for state generic filesystem tools can't see.

Press gf / gF to jump from the agent's output back to a file (and line). Multiple instances coexist safely, and enterprise managed-mcp.json policies are respected — details in [INSTALL.md](INSTALL.md#mcp-configuration).

Running multiple agents

Run agents across several tabs and two problems show up; spyc handles both.

• Which one needs me? Each tab carries a live activity dot — a hot

pulse while the agent works, a settled square when it's blocked (waiting on you) or done. The agent reports its own state over MCP, so it's right even while it redraws its UI. A transition into blocked/done fires a desktop notification naming the tab plus a brief border flash, so the nudge reaches you in another window. Tunable under [notify].

• Two agents, same files? An advisory scope registry lets agents

declare what they're editing or merging (register_scope / list_scopes / wait_for_scope_clear) so parallel agents stay out of each other's way — no daemon, in-memory, persisted across -r.

Sessions auto-save (and re-save seconds after any change, so a crash loses almost nothing); spyc -r restores every tab and resumes each agent's conversation. Full design: [docs/AGENT_ORCHESTRATION.md](docs/AGENT_ORCHESTRATION.md).

Keybindings

The essentials below. Press ? in spyc for the full overlay, or see [docs/KEYBINDINGS.md](docs/KEYBINDINGS.md) for the complete map.

| Key | Action | |-----|--------| | h j k l | Move (counts work: 5j) | | Enter / e | Open in pager / open in $EDITOR | | t | Pick / unpick a file (multi-select) | | ^\ or F10 | Toggle the agent pane | | ^a j / ^a k | Switch focus between list and pane | | ^a s | Send picked paths to the pane | | gf / gF | Jump from pane output to a file (+ line) | | F / :grep | Fuzzy filename finder / project content search | | ? | Full help overlay | | q | Quit |

Configuration

spyc reads .spycrc.toml from ~/.spycrc.toml (user) and ./.spycrc.toml (project); changes apply live (^R to force). Bootstrap a fully-commented config with every default:

spyc --print-config > ~/.spycrc.toml

You can rebind keys, set colors and layout, tune agent notifications, and script with Lua. Full reference: [CONFIGURATION.md](CONFIGURATION.md).

> Shell users — ^a and ^w are reserved. spyc intercepts them as chord > prefixes, so a shell (or tmux) running inside the pane won't see readline's > beginning-of-line / unix-word-rubout. If you run an interactive shell as > the pane child, rebind the prefixes in .spycrc.toml; inside tmux, keep > spyc's ^a distinct from tmux's prefix (or set -s escape-time 0 for snappy > input).

> Project configs are sandboxed. A ./.spycrc.toml can set colors, layout, > ignore masks, and rebind keys to built-in actions — but its executing > bindings (unix shell commands, lua scripts, jump) are ignored; only your > ~/.spycrc.toml may bind those. So opening spyc in a cloned repo can't run > commands a malicious .spycrc.toml planted there.

Recommended setup

• Terminal: iTerm2 (macOS), WezTerm, Kitty, Ghostty, or Alacritty
• Font: Any Nerd Font for the powerline status bar.

Press C to toggle mono mode if you prefer not to install one.

• Claude Code: npm install -g @anthropic-ai/claude-code
• Platforms: macOS and Linux (x86_64, aarch64). Windows via WSL.

See [INSTALL.md](INSTALL.md) for detailed setup instructions.

More docs

• [FEATURES.md](FEATURES.md) -- complete feature reference
• [docs/KEYBINDINGS.md](docs/KEYBINDINGS.md) -- the full keymap (the ? overlay in browsable form)
• [CONFIGURATION.md](CONFIGURATION.md) -- config reference: .spycrc.toml, notifications, keymap DSL, Lua
• [INSTALL.md](INSTALL.md) -- install (Homebrew, apt, binary), terminal, font, clipboard, and MCP setup
• [BUILD.md](BUILD.md) -- build from source: Rust toolchain, make install, cross-compilation
• [ARCHITECTURE.md](ARCHITECTURE.md) -- concurrency model, MVU target shape, persistence, MCP transport
• [docs/AGENTORCHESTRATION.md](docs/AGENTORCHESTRATION.md) -- how the activity dots, notifications, session-resume, and scope registry fit together
• [DESIGN.md](DESIGN.md) -- UI design language: components, surfaces, palette, extension checklist
• [CHANGELOG.md](CHANGELOG.md) -- release history
• [ROADMAP.md](ROADMAP.md) -- strategy, direction, and the decisions log
• [CONTRIBUTING.md](CONTRIBUTING.md) -- contribution guidelines and SemVer policy
• Issues -- the live backlog: bugs, features, and ideas (labeled, on the roadmap board)

License

BSD-3-Clause. Logo uses Twemoji pepper artwork (CC-BY 4.0).

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: Tripstack-Corp
• Source: Tripstack-Corp/spyc
• License: BSD-3-Clause

Install and usage instructions live in the source repository linked above.